AW: CRV Blues

Horvath Ernst ernst.horvath at SIEMENS.AT
Tue Jul 17 05:06:56 EDT 2001


the call-ID is the real means to tie together all messages related to the
same call.

Regarding your specific questions:

For a GK routed call, the GK "knows" about the call even in the case of
pre-granted admission, and can of course send BRQ/IRQ. The CRV used for
these RAS messages can be the same as in SETUP.

For a directly routed call with pre-granted admission, the GK is not
immediately aware of the call (periodic IRQs for all calls is one way to
obtain this knowledge eventually). However, the endpoint can always send RAS
messages, e.g. BRQ or IRR. For these RAS messages it will use an arbitrary
locally unique CRV and, more important, the same globally unique call-ID.

Ernst Horvath
Siemens AG

> -----Ursprüngliche Nachricht-----
> Von: Paul, Manoj [mailto:mpaul at TRILLIUM.COM]
> Gesendet am: Dienstag, 17. Juli 2001 01:39
> An: ITU-SG16 at mailbag.cps.INTEL.COM
> Betreff: CRV Blues
>  Hi All,
>   I have a couple of question related to the use of RAS CRV.
> Consider an endpoint EP1 has pre-granted admission and sends
> SETUP with
> 225CRV1 to
> GK. If GK subsequently sends a BRQ/IRQ for this call, what
> RASCRV is uses in
> these
> messages. Would RASCRV be same as 225CRV1 ?
> Secondly, is it expected that GK can potentially send BRQ/IRQ
> for a call for
> which it gave
> pre-granted admission to an endpoint?
> Any pointers are appreciated.
> regards
> Manoj Paul.
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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